Patents by Inventor Stephane QUERU

Stephane QUERU has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • PROCESS FOR SYNTHESIZING TRIARYLMETHANE SULFONE COMPOUNDS
    Publication number: 20230348372
    Abstract: A process for synthesizing a compound of formula (I) including: (a) condensing the benzaldehyde compound of formula (II) with the dialkylaniline of formula (III) to give the triphenylmethane of formula (IV); (b) treating the triphenylmethane of formula (IV) with sulfuric acid to form the triphenylmethane sulfone of the formula (V); and (c) oxidizing the triphenylmethane sulfone of formula (V) with a quinone. Such a process may be used to prepare patent blue.
    Type: Application
    Filed: April 1, 2021
    Publication date: November 2, 2023
    Applicant: PROVEPHARM LIFE SOLUTIONS
    Inventors: Stephane QUERU, Babak SAYAH, Nicolas DRILLAUD, Nicolas LOPEZ
  • PROCESS FOR SYNTHESIZING SULFONATED TRIARYL METHANE COMPOUNDS
    Publication number: 20230159444
    Abstract: A process for preparing a compound of formula including oxidizing the triphenylmethane sulfone of formula (V) with a quinone chosen from 1,4-benzoquinone, 1,2-benzoquinone, a di(C1-C4)alkyl-1,4-benzoquinone, a di(C1-C4)alkyl-1,2-benzoquinone, a mono(C1-C4)alkyl-1,4-benzoquinone and a mono(C1-C4)alkyl-1,2-benzoquinone. A crystalline form of patent blue, sodium salt, can be achieved.
    Type: Application
    Filed: April 1, 2021
    Publication date: May 25, 2023
    Applicant: PROVEPHARM LIFE SOLUTIONS
    Inventors: Stephane QUERU, Babak SAYAH, Nicolas DRILLAUD, Nicolas LOPEZ